Since making this post I have realized that Romano ("Pecorino") is a far superior version of Parmesan.
No don't do it! They are not the same, they do not taste the same. Parm is aged longer and is cow milk. It has a softer, nutty flavor. Pecorino is aged only briefly, and is sheep milk. It is sharper, saltier, and tangier. They are different. They are both good, but not interchangeable. Each has it's place, depending on the recipe.